US325336A - Friction device for spools in cordage and twine making machines - Google Patents

Description

(No Model.)

B. S. 82 J. B. HALE.

FRICTION DEVIGE FOR $POOLS IN GORDAGE AND TWINE MAKING MACHINES.

No 325,336. Patented Sept. 1, I885.

INVENTBHE .%m

- WITNESSES UNITED STATES PATENT rricn.

BERNICE HALE AND JAMES B. HALE, OF MALDEN, MASSACHUSETTS.

FRICTION DEVICE FOR SPOOLS IN CORDAGE AND TWINE MAKlNG MACHINES.

:EEFEGIFECATION forming part of Letters Patent No. 325,336, dated September 1, 1885.

Application filed August 28, 1884.

To all 20720711, it may concern:

Be it known that we, BERN 10E S. HALE and Janus B. HALE, citizens of the United States, residing at Malden, in the county of Middlesex and State of Massachusetts, have invented an Improved Friction Device for Spools in Cordage and Twine Making Machines, of which the following is a full, clear, and exact descrip tion, reference being had to the accompanying drawings, making part of this specification, in which- Figure 1 is an elevation of a portion of a twisting-frame having our improved friction device applied to the deadspindle of one of the take-up spools. Fig. 2 is a vertical section of the friction device enlarged. Fig. 3 is a vertical section representing a modification of our invention. 7

In twisting-frames as heretofore constructed, it is customary to apply a certain amount of friction to the spools as they are rotated by the yarn or cord carried by the flier in order to produce a proper degree of tension upon the yarn or cord as it is twisted by the rapid revolutions of the flier. The friction device most commonly used consists of a stationary leather strap passing around a pulley on the spindle which supports the spool, one end of said strap being permanently fixed, while the other end is made adjustable by means of a screw and nut, whereby it is caused to bear upon the pulley with more or less force, according to the amount of friction desired. This device is, however, exceedingly objectionable, as the high velocity of the spindle generates a degree of heat between the pulley and the friction-strap suiiicient to soon burn the latter and render it worthless, while the starting up of the machine is attended with diflicnlty on account of the extra power required to overcome the friction of the straps above referred to.

Our invention has for its object to overcome these difficulties and to provide a simple and efficient device which will produce the necessary friction to nicely regulate the tension upon the yarn or cord as it is wound onto the spool, and which is not liable to rapid destruction by heat, and will allow of the machine being started with much less power than is necessary with the friction devices hereto- (No model.)

belts passing from the different-sized portions of one pulley to the opposite pulley, whereby as the pulleys are rapidly revolved a gradual slip of one or both of the belts thereon is produced, and the required friction thus created to retard the revolution of the spool, as hereinafter set forth.

In thesaid drawings, A represents atwistingframe; B, the flier, which is rotated by a belt passing around the whirl a, and (J the deadspindle, which is supported by the vertical bearing D, and at its lower end in a suitable step, b, and carries at its upper end the takeup spool G, which is rotated, as usual, by the yarn or cord 0 as the latter is rapidly carried around by the flier B to put in the twist. The spindle-step b is located on the rail E, which is raised and lowered, as usual, by mechanism not shown, in order that the spool may be moved up and down to accomplish the proper winding thereon of the yarn or cord. The spindle, spool, and flier above described are, however, all of the usual construction, and as they form no part of our present invention will not be further particularly described.

o will now describe the friction device, by means of which the rotation of the spool G is retarded and the required tension put upon the yarn or cord 0.

To the spindle 0, near its bottom, is securely fixed a pulley, 11, having two portions, d e, of different diameters, and immediately opposite and in close proximity thereto is mounted on a vertical stud, f, rising from the movable rail E, or a slide adapted to move therein, a similar pulley, I, which is placed in a position the reverse of that occupied by the pulley H, so that the larger portion of one pulley will be opposite to or in line with the smaller portion of the other pulley. These two pulleys are connected by two parallel belts, g h, the upper one, 9, of which passes from the smaller portion, (1, of the pulley H to the larger portion, k,'of the pulley I, while the lower belt, h,passes from the larger portion, e, of pulley H to the smaller portion, m, of the pulley I, and it will be apparent that as the spindle O is rotated the tendency of the belts will be to drive the two portions of each pulley at different rates of speed; but as these two portions cannot move independently of each other, it follows that one or both of the belts must slip gradually and slowly on the pulleys as the latter are running at a high velocity, whereby a friction is produced that can be easily governed and a uniform tension put upon the yarn or cord 0 as it is wound upon the spool G. Furthermore, as the slip of the belts on their pulleys is comparatively slow in proportion to the rate of speed of the latter, the liability of the belts being destroyed by heat produced by excessive friction is avoided, and the durability of the friction device thus greatly increased, whereby a considerable saving in the cost of repairs is effected. A considerable saving in power is also effected, as much less force is required in starting up the machine on account of the rolling motion of the straps over the pulleys, the initial resistance to be overcome being much less than is the case with a stationary strap passing around a pulley, and consequently as the motion of the flier is communicated to the spool and its spindle through the yarn or cord, there is much less liability of the latter being broken on the starting up of the machine.

The studf is preferably secured to a slide, Z, which is moved in suitable guides in the rail E, by means of a screw, n, and by adjusting the position of the slide 1, the tension of the belts g h can be regulated to increase or diminish the friction, as desired. Any other suitable device for tightening the belts g 71 may, however, be employed instead of the slide and screw.

Instead of two pulleys, H I, each having two portions of different diameters, one only may be so constructed, and the opposite pulley be of uniform diameter throughout, as seen in Fig. 3, in which case the same result will be attained as before, except that the amount of slip of one or both of the belts will be somewhat diminished.

What we claim as our invention, and desire to secure by Letters Patent, is-- 1. A spindle, a pulley rigidly secured thereto and having portions of different diameters, in combination with a second pulley, a support therefor, and a pair of belts connecting both pulleys,substantially as described, whereby the belt from the larger portion of the first pulley tends to revolve the second pulley faster than the belt from the smaller portion of the first pulley, and a gradual slip and friction occurs during rotation of the pulleys, substantially as shownand described.

2. A spindle, a pulley having portions of different diameters, in combination with a second pulley, a support for the same, and a pair of parallel belts moving in the same direction and connecting the pulleys, substantially as described, whereby the belt from the larger portion of the first pulley tends to re volve the second pulley faster than the belt from the smaller portion of the first pulley, and a gradual slip and friction occurs during the rotation of the pulleys, substantially as herein shown and described.

3. A spindle, a pulley having portions of different diameters, avertical stud and second pulley, and pair of belts connecting the two pulleys, in combination with a slide carrying the second pulley and a screw or other equivalent device for adjusting the position of the slide, substantially as shown and described.

Witness our hands this 25th day of August, A. D. 1884.

BERNICE S.- HALE. JAMES B. HALE.

In presence of- P. E. TESCHEMAOHER, W'. J. CAMBRIDGE.

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